tibbles



(ModeL) 2 Sheets-Sheet 1' G. E. TIBBLES. TAKE-UP MBG'HANIsM FOR SEWINGMACHINES.

No. 328,536. Patented Oct. 20, 1885.

Wi ii elsflfl flvevafor;

. azarzegzwzzzzzm,

flzzz N. PETERS. Phmlrhthvgnphon w hin mn. D. c,

(ModeL) 2 Sheets-Sheet 2.

0-. E, TIBBLES. TAKE-UP MECHANISM FOR SEWING MACHINES.

No. 328536 Patented o z qgssa.

UNITED STATES PATENT OFFICE.

CHARLES E. TIBBLES, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE TIBBLESMANUFACTURING COMPANY, OF SAME PLACE.

TAKE-UP MECHANISM FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 328,536, dated October20, 1885.

Application filed March 5, 1885. Serial No. 157,786. (ModeL) To all whomit may concern/.-

Be it known that 1, CHARLES E. TIBBLES, of Chicago, in the county ofCook and State of Illinois, have invented certain Improvements inTake-Up Mechanisms for SewingMachines; and I hereby declare thefollowing to be a full, clear, and exact description of the same,reference being had to the accompanying drawings, making part of thisspecification, in which Figure 1 is an elevation of the head of asewing-machine with the face-plate removed,

showing the cam-arm to operate the take-up.

Fig. 2 is an inside view in elevation of the removed faceplate andtake-up arm. Fig. 3 is an elevation of the head of the machine with thefaceplate broken away and exposing the take-up lever and operating-arm.Fig. 4 is a vertical section on the line 3 y of Fig. 3. Fig. 5 is ahorizontal section on the line ma; of Fig. 1. Fig. 6 is a horizontalsection on the line 2 z of Fig. 1. Fig. 7 shows details of the camarm.Fig. 8 shows details of the take-up arm. Fig. 9 shows details of thecrank-lever when made separate from the take-up arm.

My invention relates to mechanismsfor operating the take-up arm ofsewing-machines, and has for its object to produce a cheap and durablemeans for imparting a. positive motion to the take up arm.

To this end my invention consists in a pivoted take-up arm incombination with a cam on the end of the needle-bar rock-shaft foroperating the same.

In order that those skilled in the art may make and use my invention, Iwill proceed to describe the exact manner in which I have carried itout.

In the said drawings, H is the take-up lever, having on its end acrank-lever, H, and pivoted to the face-plate by a shouldered screw, Z,around which it freely vibrates. The end of the crank-lever H has in ita pin, Z, on which is an anti-friction roller, Z. The rockshaft I isprovided with an arm, I, in which is cut a curved slot, m, of such awidth as to fit roller Z. The curved or cam slot m is cut on a truecurve drawn on a radius from the center of the rock-shaft for abouttwo-thirds of its length, the other third turning abruptly away from thecenter. When the face-plate is fitted to the head of the machine, theroller Z enters the cam-slot m, and, as the rock-shaft vibrates arm E,the roller runs up and down the slot m and actuates the take-up arm orlever Hthrough the medium of crank-arm H. This construction of the slotcauses the take-up lever to stand still an instant whileitis at itslowest point, before it starts upward, and while the shuttle passesthrough the loop.

Having thus described my invention,what I claim, and desire to secure byLetters Patent, 1s

The rock-shaft I, provided with arm L, in which is out a cam-slot, m, incombination with the take-up lever H, and an arm, H, to connect thetake-up lever with arm L, substantially as specified.

CHARLES E. TIBBLES.

Witnesses:

F. A. ELLSWORTH, T. C. BREcH'r.

